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-rw-r--r--xmpp-vala/src/module/xep/0272_muji.vala286
1 files changed, 286 insertions, 0 deletions
diff --git a/xmpp-vala/src/module/xep/0272_muji.vala b/xmpp-vala/src/module/xep/0272_muji.vala
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+++ b/xmpp-vala/src/module/xep/0272_muji.vala
@@ -0,0 +1,286 @@
+using Gee;
+namespace Xmpp.Xep.Muji {
+
+ public const string NS_URI = "http://telepathy.freedesktop.org/muji";
+
+ public class Module : XmppStreamModule {
+ public static ModuleIdentity<Module> IDENTITY = new ModuleIdentity<Module>(NS_URI, "0272_muji");
+
+ public async GroupCall? join_call(XmppStream stream, Jid muc_jid, bool video) {
+ StanzaNode initial_muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns()
+ .put_node(new StanzaNode.build("preparing", NS_URI));
+
+ var group_call = new GroupCall(muc_jid);
+ stream.get_flag(Flag.IDENTITY).calls[muc_jid] = group_call;
+
+ group_call.our_nick = "%08x".printf(Random.next_int());
+ debug(@"[%s] MUJI joining as %s", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), group_call.our_nick);
+ Xep.Muc.JoinResult? result = yield stream.get_module(Muc.Module.IDENTITY).enter(stream, muc_jid, group_call.our_nick, null, null, initial_muji_node);
+ if (result == null || result.nick == null) return null;
+ debug(@"[%s] MUJI joining as %s done", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), group_call.our_nick);
+
+ // Determine all participants that have finished preparation. Those are the ones we have to initiate the call with.
+ Gee.List<Presence.Stanza> other_presences = yield wait_for_preparing_peers(stream, muc_jid);
+ var finished_real_jids = new ArrayList<Jid>(Jid.equals_func);
+ foreach (Presence.Stanza presence in other_presences) {
+ if (presence.stanza.get_deep_subnode(NS_URI + ":muji", NS_URI + ":preparing") != null) continue;
+ Jid? real_jid = stream.get_flag(Muc.Flag.IDENTITY).get_real_jid(presence.from);
+ if (real_jid == null) {
+ warning("Don't know the real jid for %s", presence.from.to_string());
+ continue;
+ }
+ finished_real_jids.add(real_jid);
+ }
+ group_call.peers_to_connect_to.add_all(finished_real_jids);
+
+ // Build+send our own MUJI presence
+ StanzaNode muji_node = new StanzaNode.build("muji", NS_URI).add_self_xmlns();
+
+ foreach (string media in video ? new string[] { "audio", "video" } : new string[] { "audio" }) {
+ StanzaNode content_node = new StanzaNode.build("content", Xep.Jingle.NS_URI).add_self_xmlns()
+ .put_attribute("name", media);
+ StanzaNode description_node = new StanzaNode.build("description", Xep.JingleRtp.NS_URI).add_self_xmlns()
+ .put_attribute("media", media);
+ content_node.put_node(description_node);
+
+ Gee.List<Xep.JingleRtp.PayloadType> payload_types = null;
+ if (other_presences.is_empty) {
+ payload_types = yield stream.get_module(Xep.JingleRtp.Module.IDENTITY).get_supported_payloads(media);
+ } else {
+ yield compute_payload_intersection(stream, group_call, media);
+ payload_types = group_call.current_payload_intersection[media];
+ }
+ foreach (Xep.JingleRtp.PayloadType payload_type in payload_types) {
+ description_node.put_node(payload_type.to_xml().add_self_xmlns());
+ }
+ muji_node.put_node(content_node);
+ }
+
+ Presence.Stanza presence_stanza = new Presence.Stanza() { to=muc_jid.with_resource(group_call.our_nick) };
+ presence_stanza.stanza.put_node(muji_node);
+ stream.get_module(Presence.Module.IDENTITY).send_presence(stream, presence_stanza);
+
+ return group_call;
+ }
+
+ private async Gee.List<Presence.Stanza> wait_for_preparing_peers(XmppStream stream, Jid muc_jid) {
+ var promise = new Promise<Gee.List<Presence.Stanza>>();
+
+ ArrayList<Jid> preparing_peers = new ArrayList<Jid>(Jid.equals_func);
+
+ Gee.List<Presence.Stanza> presences = get_other_presences(stream, muc_jid);
+
+ foreach (Presence.Stanza presence in presences) {
+ StanzaNode? preparing_node = presence.stanza.get_deep_subnode(NS_URI + ":muji", NS_URI + ":preparing");
+ if (preparing_node != null) {
+ preparing_peers.add(presence.from);
+ }
+ }
+
+ debug("[%s] MUJI waiting for %i/%i peers", stream.get_flag(Bind.Flag.IDENTITY).my_jid.to_string(), preparing_peers.size, presences.size);
+
+ if (preparing_peers.is_empty) {
+ return presences;
+ }
+
+ GroupCall group_call = stream.get_flag(Flag.IDENTITY).calls[muc_jid];
+ group_call.waiting_for_finish_prepares[promise] = preparing_peers;
+
+ return yield promise.future.wait_async();
+ }
+
+ private async void compute_payload_intersection(XmppStream stream, GroupCall group_call, string media) {
+ Gee.List<Presence.Stanza> presences = get_other_presences(stream, group_call.muc_jid);
+ if (presences.is_empty) return;
+
+ Gee.List<Xep.JingleRtp.PayloadType> intersection = parse_payload_types(stream, media, presences[0]);
+ var remove_payloads = new ArrayList<Xep.JingleRtp.PayloadType>();
+
+ // Check if all peers support the payloads
+ foreach (Presence.Stanza presence in presences) {
+ Gee.List<Xep.JingleRtp.PayloadType> peer_payload_types = parse_payload_types(stream, media, presence);
+
+ foreach (Xep.JingleRtp.PayloadType payload_type in intersection) {
+ if (!peer_payload_types.contains(payload_type)) {
+ remove_payloads.add(payload_type);
+ }
+ }
+ }
+ // Check if we support the payloads
+ foreach (Xep.JingleRtp.PayloadType payload_type in intersection) {
+ if (!yield stream.get_module(Xep.JingleRtp.Module.IDENTITY).is_payload_supported(media, payload_type)) {
+ remove_payloads.add(payload_type);
+ }
+ }
+ // Remove payloads not supported by everyone
+ foreach (Xep.JingleRtp.PayloadType payload_type in remove_payloads) {
+ intersection.remove(payload_type);
+ }
+
+ // Check if the payload intersection changed (if so: notify)
+ bool changed = !group_call.current_payload_intersection.has_key(media) ||
+ !group_call.current_payload_intersection[media].contains_all(intersection) ||
+ !intersection.contains_all(group_call.current_payload_intersection[media]);
+
+ if (changed) {
+ group_call.current_payload_intersection[media] = intersection;
+ group_call.codecs_changed(intersection);
+ }
+ }
+
+ private Gee.List<Xep.JingleRtp.PayloadType> parse_payload_types(XmppStream stream, string media, Presence.Stanza presence) {
+ Gee.List<Xep.JingleRtp.PayloadType> ret = new ArrayList<Xep.JingleRtp.PayloadType>(Xep.JingleRtp.PayloadType.equals_func);
+
+ foreach (StanzaNode content_node in presence.stanza.get_deep_subnodes(NS_URI + ":muji", Xep.Jingle.NS_URI + ":content")) {
+ StanzaNode? description_node = content_node.get_subnode("description", Xep.JingleRtp.NS_URI);
+ if (description_node == null) continue;
+
+ if (description_node.get_attribute("media") == media) {
+ Gee.List<StanzaNode> payload_nodes = description_node.get_subnodes("payload-type", Xep.JingleRtp.NS_URI);
+ foreach (StanzaNode payload_node in payload_nodes) {
+ Xep.JingleRtp.PayloadType payload_type = Xep.JingleRtp.PayloadType.parse(payload_node);
+ ret.add(payload_type);
+ }
+ }
+ }
+ return ret;
+ }
+
+ private void on_received_available(XmppStream stream, Presence.Stanza presence) {
+ StanzaNode? muji_node = presence.stanza.get_subnode("muji", NS_URI);
+ if (muji_node == null) return;
+
+ var flag = stream.get_flag(Flag.IDENTITY);
+ GroupCall? group_call = flag.calls.get(presence.from.bare_jid);
+ if (group_call == null) return;
+
+ if (presence.from.resourcepart == group_call.our_nick) return;
+
+ foreach (StanzaNode content_node in muji_node.get_subnodes("content", Xep.Jingle.NS_URI)) {
+ StanzaNode? description_node = content_node.get_subnode("description", Xep.JingleRtp.NS_URI);
+ if (description_node == null) continue;
+
+ string? media = description_node.get_attribute("media");
+ if (media == null) continue;
+
+ compute_payload_intersection.begin(stream, group_call, media);
+ }
+
+ StanzaNode? prepare_node = muji_node.get_subnode("preparing", NS_URI);
+ if (prepare_node == null) {
+ on_jid_finished_preparing(stream, presence.from, group_call);
+
+ if (!group_call.peers.contains(presence.from)) {
+ // A new peer finished preparing
+ Jid? real_jid = stream.get_flag(Muc.Flag.IDENTITY).get_real_jid(presence.from);
+ if (real_jid == null) {
+ warning("Don't know the real jid for %s", presence.from.to_string());
+ return;
+ }
+ debug("Muji peer joined %s / %s\n", real_jid.to_string(), presence.from.to_string());
+ group_call.peers.add(presence.from);
+ group_call.real_jids[presence.from] = real_jid;
+ group_call.peer_joined(real_jid);
+ }
+ }
+ }
+
+ private void on_received_unavailable(XmppStream stream, Presence.Stanza presence) {
+ Flag flag = stream.get_flag(Flag.IDENTITY);
+ GroupCall? group_call = flag.calls[presence.from.bare_jid];
+ if (group_call == null) return;
+
+ debug("Muji peer left %s / %s", group_call.real_jids.has_key(presence.from) ? group_call.real_jids[presence.from].to_string() : "Unknown real JID", presence.from.to_string());
+ on_jid_finished_preparing(stream, presence.from, group_call);
+ group_call.peers.remove(presence.from);
+ group_call.peers_to_connect_to.remove(presence.from);
+ if (group_call.real_jids.has_key(presence.from)) {
+ group_call.peer_left(group_call.real_jids[presence.from]);
+ }
+ group_call.real_jids.remove(presence.from);
+ }
+
+ private void on_jid_finished_preparing(XmppStream stream, Jid jid, GroupCall group_call) {
+ debug("Muji peer finished preparing %s", jid.to_string());
+ foreach (Promise<Gee.List<Presence.Stanza>> promise in group_call.waiting_for_finish_prepares.keys) {
+ debug("Waiting for finish prepares %i", group_call.waiting_for_finish_prepares[promise].size);
+ Gee.List<Jid> outstanding_prepares = group_call.waiting_for_finish_prepares[promise];
+ if (outstanding_prepares.contains(jid)) {
+ outstanding_prepares.remove(jid);
+ debug("Waiting for finish prepares %i", group_call.waiting_for_finish_prepares[promise].size);
+
+ if (outstanding_prepares.is_empty) {
+ Gee.List<Presence.Stanza> presences = get_other_presences(stream, jid.bare_jid);
+ promise.set_value(presences);
+ }
+ }
+ }
+ }
+
+ private Gee.List<Presence.Stanza> get_other_presences(XmppStream stream, Jid muc_jid) {
+ Gee.List<Presence.Stanza> presences = stream.get_flag(Presence.Flag.IDENTITY).get_presences(muc_jid);
+ string? own_nick = stream.get_flag(Flag.IDENTITY).calls[muc_jid].our_nick;
+
+ var remove_presences = new ArrayList<Presence.Stanza>();
+ foreach (Presence.Stanza presence in presences) {
+ if (presence.from.resourcepart == own_nick) {
+ remove_presences.add(presence);
+ }
+ StanzaNode? muji_node = presence.stanza.get_subnode("muji", NS_URI);
+ if (muji_node == null) {
+ remove_presences.add(presence);
+ }
+ }
+ presences.remove_all(remove_presences);
+ return presences;
+ }
+
+ public override void attach(XmppStream stream) {
+ stream.add_flag(new Flag());
+ stream.get_module(Presence.Module.IDENTITY).received_available.connect(on_received_available);
+ stream.get_module(Presence.Module.IDENTITY).received_unavailable.connect(on_received_unavailable);
+ }
+
+ public override void detach(XmppStream stream) { }
+
+ public override string get_ns() {
+ return NS_URI;
+ }
+
+ public override string get_id() {
+ return IDENTITY.id;
+ }
+ }
+
+ public class GroupCall {
+ public string our_nick;
+ public Jid muc_jid;
+ public ArrayList<Jid> peers_to_connect_to = new ArrayList<Jid>(Jid.equals_func);
+ public ArrayList<Jid> peers = new ArrayList<Jid>(Jid.equals_func);
+ public HashMap<Jid, Jid> real_jids = new HashMap<Jid, Jid>(Jid.hash_func, Jid.equals_func);
+ public HashMap<Promise, Gee.List<Jid>> waiting_for_finish_prepares = new HashMap<Promise, Gee.List<Jid>>();
+ public HashMap<string, Gee.List<Xep.JingleRtp.PayloadType>> current_payload_intersection = new HashMap<string, Gee.List<Xep.JingleRtp.PayloadType>>();
+
+ public signal void peer_joined(Jid real_jid);
+ public signal void peer_left(Jid real_jid);
+ public signal void codecs_changed(Gee.List<Xep.JingleRtp.PayloadType> payload_types);
+
+ public GroupCall(Jid muc_jid) {
+ this.muc_jid = muc_jid;
+ }
+
+ public void leave(XmppStream stream) {
+ stream.get_module(Xep.Muc.Module.IDENTITY).exit(stream, muc_jid);
+ stream.get_flag(Flag.IDENTITY).calls.unset(muc_jid);
+ }
+ }
+
+ public class Flag : XmppStreamFlag {
+ public static FlagIdentity<Flag> IDENTITY = new FlagIdentity<Flag>(NS_URI, "muji");
+
+ public HashMap<Jid, GroupCall> calls = new HashMap<Jid, GroupCall>(Jid.hash_bare_func, Jid.equals_bare_func);
+
+ public override string get_ns() { return NS_URI; }
+ public override string get_id() { return IDENTITY.id; }
+ }
+} \ No newline at end of file